/**
 * Tierra Vista Mutual Water Company - Unified Styling
 * SCADA & Telemetry Theme with Responsive Layout & Pipe Flow Animations
 */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* SCADA Dark Palette (Default) */
  --bg-app: #0b1120;
  --bg-surface: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #273549;
  --bg-elevated: #334155;
  --border-subtle: #1e293b;
  --border-panel: #334155;
  --border-bright: #475569;

  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* SCADA Industrial Accents */
  --water-cyan: #38bdf8;
  --water-cyan-glow: rgba(56, 189, 248, 0.25);
  --water-deep: #0284c7;
  --water-fill: rgba(56, 189, 248, 0.18);
  
  --status-ok: #10b981;
  --status-ok-bg: rgba(16, 185, 129, 0.15);
  --status-standby: #f59e0b;
  --status-standby-bg: rgba(245, 158, 11, 0.15);
  --status-fault: #ef4444;
  --status-fault-bg: rgba(239, 68, 68, 0.15);
  --status-idle: #64748b;

  --pipe-idle: #475569;
  --pipe-active: #38bdf8;
  --pipe-lift: #0284c7;
  --pipe-overflow: #a855f7;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

/* Light Theme Overrides */
[data-theme="light"] {
  --bg-app: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-card: #f8fafc;
  --bg-card-hover: #edf2f7;
  --bg-elevated: #e2e8f0;
  --border-subtle: #e2e8f0;
  --border-panel: #cbd5e1;
  --border-bright: #94a3b8;

  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #f8fafc;

  --water-cyan: #0284c7;
  --water-cyan-glow: rgba(2, 132, 199, 0.18);
  --water-deep: #0369a1;
  --water-fill: rgba(2, 132, 199, 0.12);

  --status-ok: #059669;
  --status-ok-bg: rgba(5, 150, 105, 0.12);
  --status-standby: #d97706;
  --status-standby-bg: rgba(217, 119, 6, 0.12);
  --status-fault: #dc2626;
  --status-fault-bg: rgba(220, 38, 38, 0.12);
  --status-idle: #94a3b8;

  --pipe-idle: #94a3b8;
  --pipe-active: #0284c7;
  --pipe-lift: #0369a1;
  --pipe-overflow: #7e22ce;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);
}

/* Base Reset & Typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  background-color: var(--bg-app);
  color: var(--text-main);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-app);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.03) 0%, transparent 70%),
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-panel);
  transition: background-color 0.2s, border-color 0.2s;
}

[data-theme="light"] .site-header {
  background-color: rgba(255, 255, 255, 0.9);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 2px 8px var(--water-cyan-glow);
  flex-shrink: 0;
}

.brand-text h1 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--text-main);
  background-color: var(--bg-card);
}

.nav-link.active {
  color: var(--water-cyan);
  background-color: var(--water-cyan-glow);
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 14px;
  right: 14px;
  height: 2px;
  background-color: var(--water-cyan);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* System Pulse Quick Status Badge */
.quick-status-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-main);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--status-ok);
  position: relative;
}

.status-dot.active-pulse::after {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border-radius: 50%;
  border: 1.5px solid var(--status-ok);
  animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

.status-dot.fault {
  background-color: var(--status-fault);
}

.status-dot.fault::after {
  border-color: var(--status-fault);
}

.status-dot.standby {
  background-color: var(--status-standby);
}

@keyframes pulse-ring {
  0% { transform: scale(0.8); opacity: 0.9; }
  70% { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.2); opacity: 0; }
}

.icon-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  border: 1px solid var(--border-panel);
  background-color: var(--bg-card);
  transition: all 0.15s ease;
}

.icon-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-card-hover);
  border-color: var(--border-bright);
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
}

@media (max-width: 840px) {
  .primary-nav {
    display: none;
  }
  
  .mobile-nav-toggle {
    display: flex;
  }

  .primary-nav.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-panel);
    padding: 16px 24px;
    box-shadow: var(--shadow-lg);
  }

  .primary-nav.mobile-open .nav-link {
    width: 100%;
    padding: 12px;
  }

  .primary-nav.mobile-open .nav-link.active::after {
    display: none;
  }
}

/* Hero Section */
.hero {
  padding: 48px 0 36px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 40px;
  align-items: center;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.kicker {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--water-cyan);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-title {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
}

.btn-primary {
  background-color: var(--water-deep);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.4);
}

.btn-primary:hover {
  background-color: #0369a1;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: var(--bg-card);
  border: 1px solid var(--border-panel);
  color: var(--text-main);
}

.btn-outline:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-bright);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Quick Glance System Health Card */
.health-glance-card {
  background: linear-gradient(145deg, var(--bg-surface) 0%, var(--bg-card) 100%);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.health-glance-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--water-cyan), var(--status-ok));
}

.health-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.health-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.health-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--status-ok-bg);
  color: var(--status-ok);
  display: flex;
  align-items: center;
  gap: 6px;
}

.glance-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.glance-metric {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.metric-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.metric-unit {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.storage-summary-bar {
  margin-top: 14px;
}

.progress-track {
  width: 100%;
  height: 8px;
  background-color: var(--bg-elevated);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 6px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--water-deep), var(--water-cyan));
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* System Alerts / Notices Bar */
.conservation-banner {
  background-color: rgba(2, 132, 199, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 24px 0 40px;
}

.conservation-content {
  display: flex;
  align-items: center;
  gap: 14px;
}

.conservation-icon {
  color: var(--water-cyan);
  flex-shrink: 0;
}

.conservation-text h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 2px;
}

.conservation-text p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Section Common Styling */
.section {
  padding: 48px 0;
}

.section-header {
  margin-bottom: 32px;
}

.section-kicker {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--water-cyan);
  margin-bottom: 8px;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.6;
}

/* Topology System Diagram Preview on Homepage */
.topology-overview-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-md);
  margin-bottom: 48px;
}

.topology-flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  margin-top: 24px;
}

@media (max-width: 920px) {
  .topology-flow-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 580px) {
  .topology-flow-steps {
    grid-template-columns: 1fr;
  }
}

.step-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}

.step-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-bright);
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--water-cyan);
  margin-bottom: 8px;
}

.step-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Photo Gallery Cards */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

.gallery-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.gallery-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-bright);
}

.gallery-thumb-container {
  width: 100%;
  height: 210px;
  background-color: var(--bg-card);
  position: relative;
  overflow: hidden;
}

.gallery-svg-art {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-card:hover .gallery-svg-art {
  transform: scale(1.03);
}

.gallery-card-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.gallery-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.gallery-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.gallery-caption {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
}

.gallery-tag {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--water-cyan);
}

/* Modal View for Gallery & Auth */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(11, 17, 32, 0.85);
  backdrop-filter: blur(8px);
  z-index: 9990;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-xl);
  max-width: 820px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-panel);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 24px;
}

.modal-image-box {
  width: 100%;
  height: 380px;
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 16px;
}

/* ==========================================================================
   STATUS & SCADA MIMIC DIAGRAM SPECIFIC STYLES
   ========================================================================== */

.telemetry-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

.scada-container {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}

.scada-toolbar {
  padding: 14px 20px;
  background-color: rgba(15, 23, 42, 0.7);
  border-bottom: 1px solid var(--border-panel);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.scada-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.scada-title-wrap h2 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.scada-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.poll-status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.poll-timer-bar {
  width: 48px;
  height: 4px;
  background-color: var(--bg-elevated);
  border-radius: 2px;
  overflow: hidden;
}

.poll-timer-fill {
  height: 100%;
  width: 100%;
  background-color: var(--water-cyan);
  transition: width 1s linear;
}

/* SVG Mimic Canvas */
.scada-canvas-wrapper {
  position: relative;
  width: 100%;
  min-height: 520px;
  background-color: #060b14;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 16px;
  user-select: none;
}

[data-theme="light"] .scada-canvas-wrapper {
  background-color: #f1f5f9;
}

.scada-svg {
  width: 100%;
  min-width: 980px;
  height: auto;
  display: block;
}

/* SCADA SVG Pipe Animations */
.pipe-bg {
  stroke: var(--pipe-idle);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.pipe-active-flow {
  stroke: var(--water-cyan);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  stroke-dasharray: 10, 8;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.pipe-active-flow.flowing {
  opacity: 1;
  animation: flow-forward 1.2s linear infinite;
}

.pipe-active-flow.flowing-reverse {
  opacity: 1;
  animation: flow-reverse 1.2s linear infinite;
}

.pipe-active-flow.flowing-slow {
  opacity: 1;
  animation: flow-forward 2.4s linear infinite;
}

@keyframes flow-forward {
  0% { stroke-dashoffset: 36; }
  100% { stroke-dashoffset: 0; }
}

@keyframes flow-reverse {
  0% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: 36; }
}

/* Pump Node SVG Styling */
.pump-node {
  cursor: pointer;
}

.pump-housing {
  fill: var(--bg-card);
  stroke: var(--border-bright);
  stroke-width: 2.5;
  transition: stroke 0.15s ease;
}

.pump-housing.running {
  fill: #064e3b;
  stroke: var(--status-ok);
}

.pump-housing.fault {
  fill: #7f1d1d;
  stroke: var(--status-fault);
}

.pump-housing.standby {
  fill: #1e293b;
  stroke: #64748b;
}

/* Stable hover outline without any geometric transforms or filter recalculations */
.pump-node:hover .pump-housing {
  stroke: #38bdf8;
}

.pump-node:hover .pump-housing.running {
  stroke: #6ee7b7;
}

.pump-node:hover .pump-housing.fault {
  stroke: #fca5a5;
}

.pump-node:hover .pump-housing.standby {
  stroke: #38bdf8;
}

.pump-impeller {
  pointer-events: none;
}

.pump-node text {
  pointer-events: none;
}

.pump-node rect,
.pump-node line {
  pointer-events: none;
}

.pump-node .pump-housing {
  pointer-events: all;
}

/* Tank SVG Elements */
.tank-vessel {
  fill: var(--bg-card);
  stroke: var(--border-bright);
  stroke-width: 2;
  transition: all 0.3s ease;
}

.tank-water {
  fill: url(#waterGradient);
  transition: height 0.5s ease-out, y 0.5s ease-out;
}

.tank-water-wave {
  fill: url(#waterWaveGradient);
}

.sensor-dot {
  transition: all 0.25s ease;
}

.sensor-dot.tripped {
  fill: var(--status-ok);
  stroke: #ffffff;
  stroke-width: 1.5;
  filter: drop-shadow(0 0 4px var(--status-ok));
}

.sensor-dot.untripped {
  fill: #475569;
  stroke: #1e293b;
  stroke-width: 1;
}

.sensor-dot.alert {
  fill: var(--status-fault);
  stroke: #ffffff;
  stroke-width: 1.5;
  filter: drop-shadow(0 0 5px var(--status-fault));
}

/* Filter Vessels in SCADA Mimic */
.filter-vessel {
  stroke-width: 1.5;
  transition: all 0.2s ease;
}

.pressure-gauge-node {
  pointer-events: none;
}

/* Telemetry Dashboard Stats Cards */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

@media (max-width: 1040px) {
  .metrics-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 580px) {
  .metrics-row {
    grid-template-columns: 1fr;
  }
}

.metric-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-lg);
  padding: 18px;
  position: relative;
}

.metric-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.panel-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.panel-val-large {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.1;
  margin-bottom: 4px;
}

.panel-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Dev Simulation Control Panel (Collapsible) */
.simulation-panel {
  margin-top: 24px;
  background-color: var(--bg-surface);
  border: 1px dashed var(--border-bright);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.25s ease;
}

.sim-header {
  padding: 14px 20px;
  background-color: rgba(30, 41, 59, 0.6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.sim-header:hover {
  background-color: rgba(30, 41, 59, 0.9);
}

.sim-body {
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  border-top: 1px solid var(--border-panel);
}

.simulation-panel.collapsed .sim-body {
  display: none;
}

.sim-group {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
}

.sim-group-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--water-cyan);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sim-control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.85rem;
}

.sim-control-row:last-child {
  border-bottom: none;
}

.segmented-control {
  display: inline-flex;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
}

.segment-btn {
  padding: 4px 8px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.15s ease;
}

.segment-btn:hover {
  color: var(--text-main);
}

.segment-btn.active {
  background-color: var(--water-deep);
  color: #ffffff;
}

.segment-btn.active.fault {
  background-color: var(--status-fault);
  color: #ffffff;
}

.segment-btn.active.ok {
  background-color: var(--status-ok);
  color: #ffffff;
}

/* Preset Scenario Buttons */
.scenario-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-panel);
  grid-column: 1 / -1;
}

.scenario-btn {
  padding: 6px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-panel);
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.scenario-btn:hover {
  color: var(--text-main);
  border-color: var(--water-cyan);
  background-color: var(--bg-card-hover);
}

/* ==========================================================================
   DOCUMENT REPOSITORY STYLES (documents.html)
   ========================================================================== */

.docs-search-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-lg);
  padding: 10px 18px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.docs-search-input {
  flex-grow: 1;
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-main);
  outline: none;
}

.docs-search-input::placeholder {
  color: var(--text-muted);
}

.category-filter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.filter-tab-btn {
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.filter-tab-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-card);
}

.filter-tab-btn.active {
  background-color: var(--water-deep);
  border-color: var(--water-deep);
  color: #ffffff;
}

.doc-category-block {
  margin-bottom: 40px;
}

.category-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-panel);
  margin-bottom: 20px;
}

.category-heading {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.category-count {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.doc-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

@media (max-width: 480px) {
  .doc-cards-grid {
    grid-template-columns: 1fr;
  }
}

.doc-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  position: relative;
}

.doc-card:hover {
  transform: translateY(-2px);
  border-color: var(--water-cyan);
  box-shadow: var(--shadow-md);
}

.doc-card-top {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 12px;
}

.doc-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: rgba(2, 132, 199, 0.12);
  color: var(--water-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.doc-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 4px;
}

.doc-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

.doc-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.doc-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.doc-link-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--water-cyan);
  transition: gap 0.15s ease;
}

.doc-card:hover .doc-link-action {
  gap: 9px;
  color: #38bdf8;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-panel);
  padding: 48px 0 28px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

.footer-brand h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-main);
  margin-bottom: 12px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a:hover {
  color: var(--water-cyan);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Member Single Sign-On (SSO) & Whitelist Authentication
   ========================================================================== */

.member-auth-widget {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
}

.member-login-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  border-color: var(--water-cyan);
  color: var(--water-cyan);
  padding: 0 12px;
  height: 38px;
  box-sizing: border-box;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  transition: all 0.2s ease;
}

.member-login-btn:hover {
  background-color: var(--water-cyan-glow);
  color: var(--water-cyan);
  border-color: var(--water-cyan);
}

/* Single Member Profile Badge with Hover Logout */
.member-user-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-md);
  padding: 0 12px;
  height: 38px;
  box-sizing: border-box;
  cursor: pointer;
  transition: all 0.2s ease;
  overflow: hidden;
  user-select: none;
  align-self: center;
}

.member-user-badge:hover {
  border-color: var(--status-fault);
}

.member-user-info {
  display: flex;
  align-items: center;
  gap: 8px;
  transition: opacity 0.15s ease;
}

.member-user-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  line-height: 1.2;
}

.member-user-email {
  font-size: 0.70rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
  line-height: 1.2;
}

.member-avatar-initials {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--water-cyan), var(--water-deep));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.70rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Hover overlay: reveals the Logout button smoothly */
.member-user-logout-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  background-color: var(--status-fault);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: calc(var(--radius-md) - 1px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15);
}

.member-user-badge:hover .member-user-logout-overlay {
  opacity: 1;
  pointer-events: auto;
}

.member-user-logout-overlay:active {
  background-color: #dc2626;
}

/* Auth Modal Specifics */
.auth-modal-box {
  max-width: 540px !important;
}

.auth-callout-warning {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background-color: var(--status-standby-bg);
  border: 1px solid var(--status-standby);
  border-radius: var(--radius-md);
  font-size: 0.84rem;
  color: var(--status-standby);
  margin-bottom: 16px;
}

.auth-tabs-nav {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--border-panel);
  margin-bottom: 16px;
}

.auth-tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 8px 14px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.auth-tab-btn:hover {
  color: var(--text-main);
}

.auth-tab-btn.active {
  color: var(--water-cyan);
  border-bottom-color: var(--water-cyan);
}

.whitelist-list-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 220px;
  overflow-y: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px;
  background-color: var(--bg-surface);
}

.whitelist-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.member-role-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background-color: rgba(5, 150, 105, 0.15);
  color: var(--status-ok);
}

.whitelist-delete-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
  padding: 0 4px;
}

.whitelist-delete-btn:hover {
  color: var(--status-fault);
}

/* Floating Auth Toast */
.auth-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 500;
  animation: toastSlideUp 0.25s ease-out;
}

@keyframes toastSlideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-toast-success {
  background-color: var(--bg-card);
  border: 1px solid var(--status-ok);
  color: var(--status-ok);
}

.auth-toast-info {
  background-color: var(--bg-card);
  border: 1px solid var(--water-cyan);
  color: var(--water-cyan);
}

.auth-toast-error {
  background-color: var(--bg-card);
  border: 1px solid var(--status-fault);
  color: var(--status-fault);
}

/* Page Access Gate & Protected Route Security */
body.auth-protected-page:not(.auth-authenticated) main {
  display: none !important;
}

.protected-page-gate {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background: radial-gradient(circle at 50% 20%, rgba(56, 189, 248, 0.06), transparent 70%), var(--bg-body);
}

.gate-card {
  max-width: 580px;
  width: 100%;
  background-color: var(--bg-card);
  border: 1px solid var(--border-panel);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  animation: gateCardFadeIn 0.3s ease-out;
}

@keyframes gateCardFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.gate-icon-wrapper {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.12);
  border: 2px solid var(--water-cyan);
  color: var(--water-cyan);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.gate-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 999px;
  color: #f87171;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.gate-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.25;
}

.gate-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.gate-info-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: left;
  line-height: 1.5;
  margin-bottom: 28px;
}

.gate-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 500px) {
  .gate-actions {
    flex-direction: row;
    justify-content: center;
  }
}

.gate-actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
}

/* Nav Lock Indicator */
.nav-link.has-lock {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-lock-icon {
  width: 13px;
  height: 13px;
  color: var(--text-muted);
  opacity: 0.8;
  vertical-align: middle;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.nav-link:hover .nav-lock-icon {
  color: var(--water-cyan);
  opacity: 1;
}

/* Public Info Page Pill */
.public-info-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--status-ok);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 999px;
}